Hostname: page-component-76fb5796d-22dnz Total loading time: 0 Render date: 2024-04-25T12:07:22.525Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructure and mechanical properties of the Mg–Zn–Cu/SiCp composite in the as-cast and as-extruded conditions

Published online by Cambridge University Press:  02 September 2019

Afshin Nafari ,
Mehdi Malekan  and
Mehrab Lotfpour
Afshin Nafari
Affiliation:
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran 1417614418, Iran
Mehdi Malekan*
Affiliation:
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran 1417614418, Iran
Mehrab Lotfpour
Affiliation:
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran 1417614418, Iran
*
a)Address all correspondence to this author. e-mail: mmalekan@ut.ac.ir
Get access

Abstract

Effects of adding different amounts of SiCp on the microstructure and mechanical properties of the as-cast and as-extruded Mg–7% Zn–1.5% Cu (ZC71) alloys were studied. The as-cast ZC71 alloy consisted of α-Mg phase that encircled with the MgZnCu and Mg(Zn,Cu)2 intermetallics. Hot extrusion has led to a grain-refined structure with distributed intermetallics along the extrusion direction. Adding SiCp decreased the grain size values for the as-extruded composites. The Vickers hardness values increased with SiCp addition for both conditions. The ultimate tensile strength and tensile elongation (El%) values reached the optimum level with 5 wt% SiCp addition. More SiCp additions led to more agglomerations and decrement in strength and elongation. The yield tensile strength also increased with SiC additions. Adding 5 wt% SiCp changed the brittle fracture to the more quasi-cleavage. Hot extrusion altered the fracture mode to more ductile for all composites.

Keywords

Mg alloyhot extrusionSiC particlesmicrostructuremechanical properties
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 21 , 14 November 2019 , pp. 3707 - 3716
Copyright
Copyright © Materials Research Society 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Deng, K., Wang, C., Wang, X., Wu, K., and Zheng, M.: Microstructure and elevated tensile properties of submicron SiCp/AZ91 magnesium matrix composite. Mater. Des. 38, 110–114 (2012).CrossRefGoogle Scholar
Sun, X-F., Wang, C-J., Deng, K-K., Kang, J-W., Bai, Y., Nie, K-B., and Shang, S-J.: Aging behavior of AZ91 matrix influenced by 5 μm SiCp: Investigation on the microstructure and mechanical properties. J. Alloys Compd. 727, 1263–1272 (2017).Google Scholar
Lotfpour, M., Emamy, M., Dehghanian, C., and Pourbahari, B.: Ca addition effects on the microstructure, tensile and corrosion properties of Mg matrix alloy containing 8 wt% Mg2Si. J. Mater. Eng. Perform. 27, 411–422 (2018).CrossRefGoogle Scholar
Shang, S-J., Deng, K-K., Nie, K-B., Li, J-C., Zhou, S-S., Xu, F-J., and Fan, J-F.: Microstructure and mechanical properties of SiCp/Mg–Al–Zn composites containing Mg17Al12 phases processed by low-speed extrusion. Mater. Sci. Eng., A 610, 243–249 (2014).CrossRefGoogle Scholar
Deng, K-K., Wang, X-J., Wu, Y-W., Hu, X-S., Wu, K., and Gan, W-M.: Effect of particle size on microstructure and mechanical properties of SiCp/AZ91 magnesium matrix composite. Mater. Sci. Eng., A 543, 158–163 (2012).CrossRefGoogle Scholar
Li, W-J., Deng, K-K., Zhang, X., Wang, C-J., Kang, J-W., Nie, K-B., and Liang, W.: Microstructures, tensile properties and work hardening behavior of SiCp/Mg–Zn–Ca composites. J. Alloys Compd. 695, 2215–2223 (2017).CrossRefGoogle Scholar
Lim, S-C-V. and Gupta, M.: Enhancing modulus and ductility of Mg/SiC composite through judicious selection of extrusion temperature and heat treatment. J. Mater. Sci. Technol. 19, 803–808 (2003).CrossRefGoogle Scholar
Deng, K-K., Wu, K., Wu, Y-W., Nie, K-B., and Zheng, M-Y.: Effect of submicron size SiC particulates on microstructure and mechanical properties of AZ91 magnesium matrix composites. J. Alloys Compd. 504, 542–547 (2010).CrossRefGoogle Scholar
Shen, M-J., Wang, X-J., Li, C-D., Zhang, M-F., Hu, X-S., Zheng, M-Y., and Wu, K.: Effect of submicron size SiC particles on microstructure and mechanical properties of AZ31B magnesium matrix composites. Mater. Des. 54, 436–442 (2014).CrossRefGoogle Scholar
Wu, K., Deng, K-K., Nie, K-B., Wu, Y-W., Wang, X., Hu, X., and Zheng, M.: Microstructure and mechanical properties of SiCp/AZ91 composite deformed through a combination of forging and extrusion process. Mater. Des. 31, 3929–3932 (2010).CrossRefGoogle Scholar
Chen, T-J., Jiang, X-D., Ma, Y., Li, Y-D., and Hao, Y.: Grain refinement of AZ91D magnesium alloy by SiC. J. Alloys Compd. 496, 218–225 (2010).CrossRefGoogle Scholar
Golmakaniyoon, S. and Mahmudi, R.: Microstructure and creep behavior of the rare-earth doped Mg–6Zn–3Cu cast alloy. Mater. Sci. Eng., A 528, 1668–1677 (2011).CrossRefGoogle Scholar
Lotfpour, M., Emamy, M., Dehghanian, C., and Tavighi, K.: Influence of Cu addition on the structure, mechanical and corrosion properties of cast Mg–2% Zn alloy. J. Mater. Eng. Perform. 26, 2136–2150 (2017).CrossRefGoogle Scholar
Inem, B. and Pollard, G.: Interface structure and fractography of a magnesium-alloy, metal-matrix composite reinforced with SiC particles. J. Mater. Sci. 28, 4427–4434 (1993).CrossRefGoogle Scholar
Ball, E.A. and Prangnell, P.B.: Tensile-compressive yield asymmetries in high strength wrought magnesium alloys. Scr. Metall. Mater. 31, 111–116 (1994).CrossRefGoogle Scholar
Doherty, R.D., Hughes, D.A., Humphreys, F.J., Jonas, J.J., Juul Jensen, D., Kassner, M.E., King, W.E., McNelley, T.R., McQueen, H.J., and Rollett, A.D.: Current issues in recrystallization: A review. Mater. Sci. Eng., A 238, 219–274 (1997).CrossRefGoogle Scholar
Tham, L.M., Gupta, M., and Cheng, L.: Effect of reinforcement volume fraction on the evolution of reinforcement size during the extrusion of Al–SiC composites. Mater. Sci. Eng., A 326, 355–363 (2002).CrossRefGoogle Scholar
Wang, X-J., Xu, L., Hu, X-S., Nie, K-B., Deng, K-K., Wu, K., and Zheng, M-Y.: Influences of extrusion parameters on microstructure and mechanical properties of particulate reinforced magnesium matrix composites. Mater. Sci. Eng., A 528, 6387–6392 (2011).Google Scholar
Zhong, W-M., Espérance, G-L., and Suéry, M.: Effect of thermomechanical processing on the microstructure and mechanical properties of Al–Mg (5083)/SiCp and Al–Mg (5083)/Al2O3p composites. Part 3: Fracture mechanisms of the composites. Mater. Sci. Eng., A 214, 104–114 (1996).CrossRefGoogle Scholar
Deng, K-K., Shi, J., Wang, C., Wang, X., Wu, Y., Nie, K., and Wu, K.: Microstructure and strengthening mechanism of bimodal size particle reinforced magnesium matrix composite. Composites, Part A 43, 1280–1284 (2012).CrossRefGoogle Scholar
Habibnejad-Korayem, M., Mahmudi, R., and Poole, W.J.: Enhanced properties of Mg-based nano-composites reinforced with Al2O3 nano-particles. Mater. Sci. Eng., A 519, 198–203 (2009).CrossRefGoogle Scholar
Goh, C-S., Wei, J., Lee, L-C., and Gupta, M.: Properties and deformation behaviour of Mg–Y2O3 nano composites. Acta Mater. 55, 5115–5121 (2007).CrossRefGoogle Scholar
Avedesian, M.M. and Baker, H.: ASM Specialty Handbook—Magnesium and Magnesium Alloys (ASM International, Metals Park, Ohio, 1999).Google Scholar